| 摘要 |
PURPOSE:To manufacture a W-base sintered material having high hardness, high toughness and superior in sintering property by mixing hard metal carbides, metal nitrides, etc. with W oxide in powder state, reducing said powders by hydrogen, and sintering the obtained powders as raw materials. CONSTITUTION:To 100pts.wt. of powder of W oxide such as WO3 (or WO2, W2O5), 15-100pts.wt. of >= one or 2 kinds among powders of high hardness material of carbides, nitrides, carbonitrides and their solid solution, etc. of 4b, 5b, 6b group metals in the periodic table such as Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, further if necessary, 0.5-5wt% powder of oxides such as MgO, Y2O3, Al2O3 are mixed by 0.5-5wt%. These are reduced by hydrogen, WO3, etc. reducible easily is reduced to W, and W-base powder contg. said carbide, nitride, carbonitride, oxide is made of the fine W as a base material. This powder is pressed by high pressure, and sintered at 1,400-2,000 deg.C in an inert atmosphere.
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